Tectonic and Seismotectonic Study of the Southern Sierra Nevada, California, Using Seismograms from a Temporary Network

这项研究涉及确定加利福尼亚州南部高山之下的下地壳和上地幔的结构。由部署在该地区的17个台站组成的临时台网和南加州地震台网的永久台站记录的400个远震的到达时间将被反演为速度结构。进一步的分析将涉及可能查明在岩石圈内的界面上产生的转换相，并将净辐射与远震到达时间结合起来，以分离地壳和地幔中的异常。限制塞拉山脉的岩石圈结构可能解决晚第三纪高塞拉山脉隆升的原因，并提高我们对伸展的地震活动区山脉构造的认识。这项工作是国家减少地震灾害计划的一部分。

This research involves determination of the structure of the lower crust and upper mantle beneath the southern High Sierra of California. The arrival times of four hundred teleseisms recorded by a temporary network of 17 stations deployed in the area and the permanent stations of the Southern California Seismic Network will be inverted for velocity structure. Further analysis will involve the possible identification of converted phases generated at interfaces within the lithosphere and the combination of Pn with teleseismic arrival times to separate anomalies in the crust and mantle. Constraining the lithospheric structure of the Sierra may resolve the cause of the Neogene uplift of the High Sierra and improve our understanding of the tectonics of mountain ranges in extending, seismically active regions. This work is a component of the National Earthquake Hazard Reduction Program.